Employee Benefits: (Details) (USD $)	12 Months Ended
	Feb. 28, 2013 item	Feb. 29, 2012
Employee benefits
Number of insurance coverage plans	2
Amount deductible under insurance coverage plan	$ 600
Provision for employee benefit plan	539,492	342,035
401(k) plan
Matching contribution	507	483
Minimum
Employee benefits
Pre-tax premiums per month	131
Maximum
Employee benefits
Pre-tax premiums per month	525
Lifetime benefits per covered participant	2,000,000
Benefits payable per person	$ 25,000